Truck-body-dumping mechanism.



e. AQWOOD.

TRUCK BODY DUMPING MECHANISM.

APPLICATION FILED IAN.15. 1917.

1 ,2? 1 ,975, Patented July 9, 1918.

2 SHEETS-SHEET G. A. WOOD.

TRUCK BODY DUMPING MECHANISM.

APPLICATION FILED JAN. 15, I917.

Patented July 9,1918.

is W E GARFIELD A. WOOD, OF DETROIT, MICHIGAN.

TRUCK-BODY-DUMPING MECHANISM.

Application fi1ed .Tanuary15,1917. Serial No. 142,406.

To all whom it may concern:

Be it known that'I, GARFIELD A. WOOD, a citizen of the United States, and residing at Detroit, in the county of Wayne and State of Michigan, have invented a new and Improved Truck-Body-Dumping Mechanism,

of which the following is a specification.

The present invention relates to hydraulic (oil) hoisting means whereby the front ends of truck bodies are lifted for dumping purposes, and its object is to provide a construction which is cheaper than existing devices and one which is particularly'suitable for light trucks, although not limited thereto. It consists in means whereby the upper end of the cylinder is braced; in a split clamping member extending around the cylinder at an intermediate point in the length thereof and receiving the upper ends of the brace rods; in an improved head construction for the cylinder; in means connecting said clamping member, and said head construction for retaining the latter in place; in

.means whereby the cylinder and hollow piston rod which constitute the oil reservoir may be filled to a high level through a single port; in control means for hoisting means mounted on the clamping member whereby the operation of the device may be controlled by a driver sitting on the seat; and in various other details of construction shown, described and claimed.

'In the drawings, Figure v1 is a fragmentary side elevation, parts being broken away, showing one embodiment of the invention. Fig. 2 is a view corresponding thereto looking backwardly from a plane just behind the vehicle seat. Fig. 3 is a fragmentary front view of the hoisting cylinder and support. Fig. 4 is a central section, looking from the right in Fig. 3.

Fig. 5 is a section on the line 55 of Fig.

, 4. Fig. 6 is a fragmentary side view, parts being broken away, showing a modification in which a single hoisting cable is used.

1 indicates the side bars, 2 the body pivoted to swing vertically about horizontal .pivots located near the rear end thereof, 3

the drivers seat, 4 the upright hoisting cylinder, the base5 of which is supported Specification of Letters Patent.

from the side bars through the mediurnof a suitable cross frame preferably formed of angle-irons 6 to which the base is bolted. The upper end of the cylinder is braced from the outer ends of the front angle-iron 6 by means of tension rods 8 (having nuts 9 on each end-and suitable lock washers or the equivalent if desired) whose upper ends preferably pass through holes in the rear half 11 of a clamping element that includes a front half 12 and the-connecting bolts 13 and conforms to a circumferential groove 15 cut in the outer surface of the cylinder.

The upper end of the cylinder receivesa hollow head 16 which may have circumferential flanges l8 and 19- conforming to the inner surface of the cylinder and may be machined out circumferentially to receive suitable packing 20 which, when the head is drawn downwardly as hereinafter described, allows a metal-to-metal contact between the head and the end surface of the cylinder and seals the joint. A hollow pistion rod 22, having a piston 23, slides up and down through the head and through a'packing plate 24 that has an annular depending flange 25 arranged to project into and compress packing 26 in the upper inner portion of the head 16 to insure a tight joint be tween the latter and the piston rod. The packing plate is drawn down upon the head by means of the nuts 27 on the bolts 28 and 29, spaced diametrically from each other, the former being threaded into a boss 30 on the member 11 and the latter into a boss 31 on an upward extension of the member 12.

Extending crosswise through the projecting end of the piston rod is a pivot bolt 33 upon which is supported an equalizing crossbar 34 having pulleys 35 suspended from 1 its outer ends. Cables 36, secured to the lower ends of the depending. body arms 38 of the' ibod v 2, pass over the corresponding shown and claimed in my application "for patent Serial Number 14,479, filed March 15, 1915) that is driven from av longitudinally extending shaft 42 of the vehicle in any suitable manner, for example, bythe sprocket gears 43 and 44 (the latter being mounted on the opposite side of the member 40), the chain 45, the clutch pins 46 and the clutch member 48 carried by the propeller shaft 42 of the vehicle.- The clutch pins 46 areslidable longitudinally through the gear 44 through the medium of yoke arms 50'and the actuating arm -51'rigid with the shaft 52 which is mounted in the lower ends of member 40 and a companion member 53. The specific construction described in this para-.

aph is claimed in my a plication for patent Serial Number 135,79 ,filed Decemher 8th; 1916,.and may be varied widely. In

some instances the'pump may be driven by a countershaft as shown in my application for patent Serial Number 142,405, filed J anuary 15, 1917.

In the present instance, however, thelink 55 .to which the arm 51 is connected is pivoted at" 56 to a hand lever 58 that is itself pivot-ally supported at 59 on the front face of the member 12. An suitable means is' employed for limiting the" throw of the hand tion, consisting of the. handy lever 60- and lmk 61 constitutes an actuating means for lever"in each direction. A similar connecthe valve arm 620f the pump.

In order to allow the use of the interior of the, cylinder above the piston as a reservoir for'oil, the cylinder is provided with a port 64 in the groove 15 opposite the member-12 and the latter is provided with a as,- sage 65'with whichthe suction pipe 66 w ich leads to the pum is connected by a packing gland 68. A sea mg washer 69 is interposep between the member 12 andithe cylinder.-

From the pump the oil is delivered through the pipe 70 and passage 71.(Fig. 4).to the space beneath the piston," Theinterior of. the piston rod is also used as a part of the reservoir, holes 72 (preferably cored out. in

the piston 23, thus-avoiding any drilling of the pistonrod 22) (Fig. 4) being provided to allow ingress and egress of-the liquid. At

its upper end the piston rodis'pref'erably closed by a diaphragm 73 and is perforated .at- 74 to admit air when the piston rod has risen a short distance whereby a tight seal is secured and'the partialvacuum which would otherwise obtain in the-rod is broken in the general mannenshown and claimed in my I application for'patent Serial Number 14,486,

filed March 15,1915 .The upper end of the I piston rod might in some cases be leftppen as the cross-bar 34 would exclude foreign objects, but the tendency for the oil to slop oze'r as the piston sinks would be objectiona. lo.

Considering those features of cylinder andv piston rod construction thus far described, it will be. seen that it would not 'be possible to fill that portion of the cylinder above the single port 64 by pouring liquid through said port. It would also be objectionable to pierce the cylinder at a higher level, and the head 16 and packing plate 24 could not well be pierced t6 allow the escape of the trapped air. In order to avoid'these objections and at the same time provide a cheaper construction, the piston rod is pierced at a point located above the upper edge of the piston a distance less than the distance from the port 64 to the lower surface of the head 16 as indicated at 7 6.- The cylinder and'piston rod being filled in an obvious manner 'to the level of the upper edge of the port, it is then only necessary to g 1 work the pump to elevate the piston, until it reaches the lower edge of the port 64, re-

'move the plug 78 for an upward extension and the passage 74 and allow the oil to rise as high as the entrance to the passage 79 if desired.

The pulley 35 may be mounted in different wayspreferably, however,-its shaft 80 extends through the ends of a U-shaped strap 80' that is secured to an eye-bolt 81 by a nut 82. A cable guide 83 of pressed metal is interposed between the nut and thestrap as best shown in Fig.3.

- Asshown in Fig. 6, the cables 36 may be replaced by. a single cable 85 which passes along the under side of the member 86 (that v corresponds to the member 11). from side to side partly in a groove, thus avoiding the use of the shackles 39.

From the foregoing it will be'understood that liquid may be either drawn from the reservoir through the, suction pipe 66 and discharged through the pipe 70'for lifting urposes, or may be by-passed from the p1 e O to the pipe '66 for lowering, or may 3e circulated continuously within the pump casing, as described inmy application $eria'l Number 14,479, referred to above. 0 I v u The details of construction may be varied within wide limits without departin from the spirit of the invention, and I do not, therefore, wish .to be limited except as indicated by the subjoined claims. I u Iclaim 1. A motor vehicle comprising a frame, a body pivoted to tilt thereon, an upright hoisting cylinder forward ofthe front end cable therein for tilting said body, clamping means split transversely of the cylinder and encircling the latter somewhat below the top, a pump for delivering liquid into the space below the piston to elevate the latter, and a controlling lever for said pump mounted on said clamping means.

2. A motor vehicle comprising a. frame, a body pivoted to tilt thereon, an upright hoisting cylinder forward ofthe front end of the body for tilting said body, said cylinder having a base, a cross-frame constitutin supporting means for the base of the cy'lin er, said cylinder having a circumferential groove at a point considerably above the base and below the-top, a split clamping element in said groove, and braces extending from the clamping element downwardly, forwardly and laterally to the outer ends of the cross-bar.

3. A motor vehicle comprising a frame, a body pivoted to tilt thereon, an upright hoisting cylinder forward of the body, a piston and piston 'rod reciprocable in said cylinder, means associated with the upper end of said piston rod for tilting the body, a clamping element associated with the upper portion of the cylinder, means for forcing the, clamping element transversely of the cylinder into clamping relation therewith, a pump for delivering liquid to the space below the piston, a driven shaft, means for driving the pump from the shaft, said means including clutch mechanism and controlling ,means therefor, said controlling means including a hand lever supported on the clamping element.

' 4- A motor vehiclecomprising a frame, a body pivoted to tilt. thereon, an upright hoisting cylinder forward of the body, a piston and piston rod reciprocable in said cylinder, means associated with the upper end of said piston rod fortilting the body, a clamping element associated with the upper portion of the cylinder, means for forcing the clamping element transversely of the cylinder into clampingrelationtherewith, a pump for delivering liquid to the space belowthe piston, a driven shaft-means for driving the pump from said shaft at will, a

. valve for controlling the flow of liquid to the cylinder, and valve actuating means including a hand lever element. V

5. A vehicle comprising a frame, a body pivoted to tilt thereon, an upright hoisting cylinder forward of the body, a piston and piston rod for the cylinder, a cross-arm connected to the upper end of the piston rod and extending transversely of the frame, sheaves supported on said cross-arm in a substantially vertical plane transversely of the frame, cable means passing over said mounted on the clamping sheaves and attached to the front portion of the body, means encircling the upper portion of the cylinder, said cable means being arranged to operatively engage said marcling means substantially in the transverse central vertical plane of the cylinder.

6. A motor ve icle comprising a frame, a

' body pivoted to tilt thereon, an upright hoisting cylinder forward of the body, a piston and piston rod for the cylinder, a cross-arm connected to the'upper end of the piston rod and extending transversely of the frame, sheaves supported on said cross-arm in a substantially vertical plane transversely of the frame, .means encircling theupper portion of the cylinder, a single cable passing over said sheaves and connected to the front portion of the body, said cable being arranged to transmit stress to the encircling means. I

7. A motor vehicle comprising a frame, a body pivoted to tilt thereon, an upright hoisting cylinder forward of the body, a piston and piston rod for the cylinder, a cross-arm connected to the upper end of the piston rod and extending transversely of the frame, sheaves supported on said crossarm, means encircling the upper portion of the cylinder, a-single cable passing over said from one side to the other.

8. A vehicle including a frame, a body pivoted to tilt thereon, an upright cylinder supported on said frame forwardly of the body, a piston and piston rod reciprocable in said cylinder, means associated with said piston rod for tilting the body, a splitclamping member encircling the upper portion of said cylinder andv mounted in a groove formed in the latter, means leading downwardly, forwardly and laterally from said clamping member for bracing the cylinder, a head for said upper end of the cylinder, and bolts associated with said split clamping member whereby said head is retained in position.

- 9. A vehicle comprising a, frame, a body pivoted to tilt thereon, an upright hoisting cylinder forward of the body, a piston and piston rod for the cylinder, a cross-arm pivotally connected to the upper end of the piston rod to swing about an axis which extends longitudinally of the vehicle,- said,

said encircling means substantially, in the tudinally of the vehicle, cable means passing 10 transverse central substantially vertical over said sheaves and attached to the front plane of the c linder. portion of the body, means encircling the up- 10. A vehicle comprising a frame, a body per portion of the cylinder, said cable means 5 pivoted to tilt thereon, an upright hoisting engaging the encircling means on opposite cylinder forward of" the body, a piston and sides of the central longitudinal vertical 15 piston rod for the cylinder, a pair of sheaves plane of the vehicle. supported by the piston rod, the axes about which said sheaves rotate extending lon'gi- J GARFIELD A. 'WOOD. 

